package com.function;

public class Remove {
    public String Remove(String str){
        String src1=str.replaceAll("((\r\n)|\n)[\\s\t ]*(\\1)+", "$1").replaceAll("^((\r\n)|\n)", "");
        if (src1 == ""){
            return "1";
        }
        return null;
    }
}
